package com.huanrong.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

public class LoginFilter implements Filter
{
    
    @Override
    public void init(FilterConfig filterConfig)
        throws ServletException
    {
        // TODO Auto-generated method stub
        
    }
    
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException
    {
        HttpServletRequest httpRequest = (HttpServletRequest)request;
        String path = httpRequest.getServletPath();
        HttpSession session = httpRequest.getSession();
        if (path.endsWith("/login") || session.getAttribute("user") != null)
        {
            chain.doFilter(request, response);
        }
        else
        {
            request.getRequestDispatcher("/WEB-INF/view/login.jsp").forward(httpRequest, response);
        }
    }
    
    @Override
    public void destroy()
    {
        // TODO Auto-generated method stub
        
    }
    
}
